Gear-jig.



PATENTED DEC. 13, 1904.

M. L. KING.

GEAR JIG.

APPLIUATION FILED DEC. 12. 1903.

N0 MODEL.

mmwmr VhH hi-EEE No. 777.63 PATENTED DEC. 13, 1904. M. L. KING.

GEAR JIG.

APPLICATION FILED DBO.12, 1903.

" MODEL swans-44mm 2.

inventor,

Q'vihmmw (72: Z K41 7 9- N0 MODEL.

, PATENTED DEC. 13, 1904. M. L. KING.

GEAR JIG.

APPLICATION FILED 11110.12. 1903.

3 SHEETS-BEEET 3.

UNITED STATES Patented December 13, 1904.

MATHEXV LEANDER KING, OF AMES, IOWA.

GEAR-MG.

SPECIFICATION forming part of Letters Patent No. 777,639, dated December 13, 1904.

Application filed December 12, 1903. Serial No. 184,958. (No model.)

To (ti/Z whom, it may concern.-

Be it known that I, MATHEW LEANDER KING, a citizen of the United States, residing at Amos, in the county of Story and State of Iowa, have invented a new and useful Improvement in Gear-Jigs, of which the following is a specification.

The object of my invention is the sawing of gear-patterns from turned wooden blanks.

A further object is to save much of the time required to lay out on the blank the small end of the teeth and lining down across the face and also to save handwork on the teeth.

My invention consists of a shaft carrying the wooden blank and having as a pivotal point a vertically-slotted post through which the saw-blade works, the longitudinal axis of the shaft being on a line intersecting at the pivotal point the line of the saw-teeth.

My invention also consists in the novel features of construction and combination of parts hereinafter described, particularly pointed out in the claims, and shown in the accompanying drawings, in which- Figure 1 is a side elevation of my device, the band-saw table being in section. Fig. 2 is a plan view, the table and blank being omitted. Fig. 3 is a vertical section through the pivotal and saw-guide post. Fig. 1 is a plan view of the forward portion of the base, the post being removed. Fig. 5 is a perspective view of the parts shown in plan in Fig. 4:. Figs. 6, 7, 8, and 9 are detail perspective views of the various parts assembled on the base shown in Fig. 5, the parts being shown detached. Fig. 10 is a perspective View of the shaft-handle partly broken oil. Fig. 11 is a vertical elevation of the device as used with small and flat gears. Fig. 12 is a plan view of the device as shown in Fig. 11, the gear or blank being omitted. Fig. 13 is a side elevation of an attachment for dovetailing wooden gear-teeth, the attachment being applied to the parts shown in Figs. 1, 2, 3, and 1, the base and post being omitted. Fig. 14 is a perspective view of the two sections, detached, of the clamping-disk. Fig. 15 is a detail plan view of the tooth-holding clamp. Fig. 1.6 is a view in elevation of a slightly-modified form of supporting-bracket. Fig. 17 is a plan view of said bracket. Fig. 18 is a section on the line 18 18 of Fig. 16.

In the drawings, A represents a suitable base of any desired form and construction, which is mounted upon and bolted to the band saw table A. At its forward end the base is formed with a projecting boss carrying a cylindrical lug A which has a vertical threaded bore A" and is also diametrically slotted, as shown at A, the slot intersecting the bore and extending from the front face of the lug to a point to the rear of the bore A". The

saw-blade A? is adapted to move horizontally in this slot, and while the blade works normally vertically in the bore A it is moved to the rear of the bore into the slot A while the post B is being threaded into the bore A", the post having threads cut at its lower end adapted to engage those of the said bore. This post has formed in it a vertical U-shaped slot B, which extends diametrically into the post beyond the axial center of the said post. In the top of the post to one side of the slot is formed a socket B. Over this post fits a sleeve O, flattened on opposite sides, the sleeve having the cylindrical bore 0, receiving the post B, and is cut or longitudinally slotted at C On the flattened sides threaded apertures O are formed inthe sleeve and receive the pivotscrews G which are threaded into them. The height of the sleeve 0 is greater than the length of the non-threaded portion of the post 13, and the sleeve therefore extends above the post. A washer D fits within the projecting portion of the sleeve and rests on the upper face of the post B. The washer is slotted at 1) similar to the slot 13 in the post, and in or from the bow portion of this slot extends a narrow supplemental slot D corresponding to the slot A and the slot .1) receives the back of the saw-blade and holds the same against vibration, the teeth moving vertically in the slot D. Depending from the washer is a pin D which [its in the socket B, formed in the post B, and prevents rotation of the washer.

A casting F. is formed with the bifurcated members E, having the r ining apertures E and the bow portion is 1'1 passed, as shown at E The casting has a threaded socket, (not shown,) into which is threaded the lower end of the shaft-handle E5 In cutting the ordinary bevel gear the sleeve C is used; but to allow clearance for a flat cone or a very small gear I employ a sleeve F, having the pivotal point near the top and cut away on the front, as shown at F in Fig. 11. To this sleeve is pivoted a bracket G in the same manner as the casting E is pivoted, the casting being practically a form of bracket, the bracket G having the lugs G, which correspond to the bifurcated members E of the casting-bracket. At its upper end the bracket G, which is in the form of an open rectangular frame, carries a sleeve G having a bore through which the shaft-handle E passes, and a suitable binding-screw G bears on the shaft, working through a boss on the sleeve G To support the wooden blank on the shafthandle 12*, an adjustable collar H is fitted on the shaft and secured in its adjusted position by means of the usual set-screw, as shown at H.

In Figs. 13, 14, and 15 I have shown an attachment for holding wooden gear-teeth while being dovetailed, the attachment being carried by the shaft-handle E The attachment comprises a clamp J, adapted to hold a tooth J and two disks having contacting faces, the disk J 2 having a straight bore J offset from the center of the disk and the disk J 3 having a bore J adapted to receive the shaft E, the disk J 3 having also a bore J 5 intersecting the bore J A suitable set-screw J 6 works in the bore J which is threaded and bears at its inner end on the shaft-handle 13*. The clamp J consists of a short section J into which one end of the rod J is secured, and a long curved section J having a bifurcated end portion engaging the rod J and held to the section J 7 by an adjustable screw or bolt. Both sections carry suitable jaws adapted to coact together and hold the tooth J. The rod J passes through the bore J and a set-screw J 6 works through a bore similar to that at J 5 and bears against the rod J. A central aperture J is formed in each disk, being threaded, and a screw J passing through the disks, binds them together.

In Figs. 16, 1'7, and 18 I have shown a lightly-modified form of supporting-bracket consisting of the bracket K, having at one end a curved portion on which is formed the vertical lugs K and at the opposite end is formed a sleeve K. The lugs K correspond to the arms G of the bracketG and the sleeve K to the sleeve G and the brackets are used in practically the same manner. In assembling the parts the saw-blade is moved into the slot Afl passed to threaded bore and the post B is threaded into place. The saw-blade is then properly adjusted with the teeth on the line of the axial center of the post B, and the sleeve C is then dropped into position, holding the blade against vibration after insertion of the washer D. The casting or bracket E is then placed in position, being secured by the pivot-screws (1 The shaft-handle E is then threaded into the casting, the wooden blank placed in position and adjusted for the proper bevel by means of the collar H, the movement of said collar varying the bevel of the teeth cut. It will be noted that the longitudinal axis of the shaft E* is on a lineintersecting the bore of the post B and that the axial line of the bore of the post is in the line of action of the saw-teeth. The point of intersection of these lines will be the apex of any gear-pattern that is being cut.

The advantages of the above-described construction will be obvious to those skilled in the art to which it appertains.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent. is

1. Ina gear-jig, a post havingavertical slot adapted to receive a vertically-movable sawblade, and a shaft-handle adapted to carry a blank, said handle being pivoted to the post.

2. A gear-jig comprising a post having a vertical bore adapted to receive a saw-blade, a shaft-handle pivotally connected to the post, an adjustable collar carried by the said shaft, and means for preventing vibration of the saw-blade, the line of the longitudinal axis of the shaft intersecting in the bore the line of the saw-teeth and giving the apex of the gearpattern, substantially as set forth.

3. A gear-jig comprising a base-plate having a cylindrical lug thereon, said lug having a bore and slotted, the slot intersecting the bore, the bore being threaded, a slotted post adapted to be threaded into said bore, a sleeve fitting over and extending above the post said sleeve being slotted longitudinally, a washer fitting on the post within the sleeve and slotted to receive the back of a saw-blade, said blade working through the lug and post, and a shaft-handle adapted to carry a gear-blank pivotally connected to the sleeve, as and for the purpose set forth.

i. A gear-jig comprising a vertically-slotted post, a longitudinally-cut sleeve adapted to fit over said post, a bracket pivotally connected to opposite sides of the sleeve, a shafthandle secured to the bracket, the said slotted post and sleeve forminga bore adapted to receive a saw-blade, and means for adjustably securing a gear-blank on the said shaft-han dle, substantially as described.

5. The combination with a base having a lug formed thereon, said lug having a threaded bore, a post threaded to fit the bore. of the lug, the said post having a longitudinal slot extending inwardly beyond the longitudinal axial line of the post, a sleeve adapted to fit over the post, a bracket pivotally connected to the sleeve, a shaft-handle carried by the bracket, a sectional disk, one section of said disk being carried by the shaft-handle, and the other section being carried by the firstmentioned section, a rod passingthrough the second-mentioned section of the disk, and a clamping member carried at an end of the rod, said clamping member being adapted to hold a blank.

MATHEW' LEANDER KING. Witnesses:

O. G. LEE,

M. K. SMITH. 

